Re: [PATCH 1/4] mm: page_alloc: __GFP_FS lockdep annotation for direct compaction

[Shakeel Butt]

On Fri, Jun 26, 2026 at 02:21:17PM -0400, Johannes Weiner wrote:
> A subsequent patch will have some order-0 allocations participate in
> compaction under defrag_mode, to stave off extfrag events.
> 
> Since this is a sprawling expansion of entry points, and compaction
> can enter filesystem paths, add lockdep annotations that catches
> __GFP_FS passing errors.
> 
> Direct reclaim has had this annotation for a while, and since reclaim
> and compaction are usually used in conjunction, this is unlikely to
> unearth old bugs. It's more about future proofing and peace of mind.
> 
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Acked-by: Shakeel Butt <shakeel.butt@xxxxxxxxx>